Internet and Web
NCERT Class 12 Informatics Practices Chapter 5: Internet and Web (Pages 137–166)
Summary of Internet and Web
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Internet and Web Summary
In today's digital age, being connected is crucial, and this chapter covers the fundamental concepts of computer networks and the Internet. A computer network is a group of interconnected devices that can communicate with each other, allowing them to share data and resources. These networks can be small, like a few computers in an office, or vast like the Internet that connects millions of devices around the world. The chapter explains different types of networks based on geographic coverage, including Local Area Networks (LAN), Metropolitan Area Networks (MAN), and Wide Area Networks (WAN). LANs connect devices over short distances, like within a home or office, while WANs cover broader areas such as multiple cities or countries, with the Internet being the largest WAN. Students learn about essential networking devices that facilitate communication. These include modems for converting digital signals to analog for transmission, routers that forward data to the correct destination, switches that connect devices within a local network, and gateways that serve as access points between networks. Other devices like hubs, repeaters, and Ethernet cards are also introduced. The chapter then dives into networking topologies, which describe the layout and structure of networks, such as star, bus, ring, mesh, and tree topologies. Each topology has its advantages and disadvantages, impacting performance and reliability. Following that, the Internet's functionality is discussed. The Internet is described as a global network of computers that enables various applications such as email, chat, and Voice over Internet Protocol (VoIP), which allows users to make voice calls over the Internet. This section highlights the transformative role of the Internet in modern communication, education, and e-commerce. Furthermore, the chapter explains what websites and web pages are, detailing how information is organized and accessed on the World Wide Web. Key aspects of web development, including the use of HTML and CSS for creating static and dynamic web pages, are outlined. Finally, the chapter touches on web hosting, describing the process of making a website available online, and introduces web browsers, which are essential tools for accessing web content. Students will learn how browsers function and the importance of settings, plugins, and cookies in enhancing their browsing experience. Overall, this chapter provides a comprehensive foundation for understanding how networks and the Internet shape our connected world.
Internet and Web learning objectives
- In today's digital age, being connected is crucial, and this chapter covers the fundamental concepts of computer networks and the Internet.
- A computer network is a group of interconnected devices that can communicate with each other, allowing them to share data and resources.
- These networks can be small, like a few computers in an office, or vast like the Internet that connects millions of devices around the world.
- The chapter explains different types of networks based on geographic coverage, including Local Area Networks (LAN), Metropolitan Area Networks (MAN), and Wide Area Networks (WAN).
Internet and Web key concepts
- In this chapter, students delve into the world of computer networks and the internet.
- They begin by understanding what a computer network is and its significance in sharing information and resources.
- The chapter categorizes networks into LAN, MAN, and WAN, explaining the differences in terms of geographical coverage and speed.
- It discusses various networking devices like modems, routers, and switches, detailing their functions in establishing connections.
- Additionally, students explore networking topologies including star, bus, and mesh.
Important topics in Internet and Web
- 1.Chapter 5 of 'Informatics Practices' focuses on the Internet and Web, covering essential concepts such as computer networks, types of networks, internet applications, and web technologies.
- 2.In today's digital age, being connected is crucial, and this chapter covers the fundamental concepts of computer networks and the Internet.
- 3.A computer network is a group of interconnected devices that can communicate with each other, allowing them to share data and resources.
- 4.These networks can be small, like a few computers in an office, or vast like the Internet that connects millions of devices around the world.
- 5.The chapter explains different types of networks based on geographic coverage, including Local Area Networks (LAN), Metropolitan Area Networks (MAN), and Wide Area Networks (WAN).
- 6.LANs connect devices over short distances, like within a home or office, while WANs cover broader areas such as multiple cities or countries, with the Internet being the largest WAN.
